Isfahan University of Technology, The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 6 1 2019 11 26 The effect of sintering temperature on the intergranular properties and weak link behavior of Bi2223 superconductors The effect of sintering temperature on the intergranular properties and weak link behavior of Bi2223 superconductors 1 7 509 FA P. Kameli H. Salamati M. Eslami M. A. Khatibi Journal Article 2019 11 26  A systematic study of the intergranular properties of (Bi,Pb)2 Sr2 Ca2 Cu3 Oy (Bi2223) polycrystalline samples has been done using the electrical resistivity and AC susceptibility techniques. In this study, we have prepared a series of Bi2223 samples with different sintering temperatures. The XRD results show that by increasing the sintering temperature up to 865° c , the Bi2212 phase fraction decreases. It was found that the Bi2212 phase on the grain boundaries is likely to play the role of the weak links and consequently reduces the intergranular critical current densities.  A systematic study of the intergranular properties of (Bi,Pb)2 Sr2 Ca2 Cu3 Oy (Bi2223) polycrystalline samples has been done using the electrical resistivity and AC susceptibility techniques. In this study, we have prepared a series of Bi2223 samples with different sintering temperatures. The XRD results show that by increasing the sintering temperature up to 865° c , the Bi2212 phase fraction decreases. It was found that the Bi2212 phase on the grain boundaries is likely to play the role of the weak links and consequently reduces the intergranular critical current densities. high- Tc superconductors sintering temperature AC susceptibility Bi2212 phase intergranular properties https://ijpr.iut.ac.ir/article_509_fcc3e1e77448698364a22eff047cd215.pdf
Isfahan University of Technology, The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 6 1 2019 11 26 Electron localization and metal-insulator transition in the one-dimensional chian of atoms Electron localization and metal-insulator transition in the one-dimensional chian of atoms 9 13 510 FA A. Esmailpour M. Esmaeilzadeh Journal Article 2019 11 26   In this paper, the electron localization length was calculated numerically in a one-dimensional chain of atoms with random binary alloy. It is shown that in a one-dimensional finite-size chian of atoms, the localization length of the electron wave function decreases with increasing impurity concentration and with more increasing of the impurity concentration, the localization length becomes smaller than the system size and therefore insulator-metal transition occurs.   In this paper, the electron localization length was calculated numerically in a one-dimensional chain of atoms with random binary alloy. It is shown that in a one-dimensional finite-size chian of atoms, the localization length of the electron wave function decreases with increasing impurity concentration and with more increasing of the impurity concentration, the localization length becomes smaller than the system size and therefore insulator-metal transition occurs. localization metal-insulator transition random binary alloy https://ijpr.iut.ac.ir/article_510_b58351a9b8f015668b7cd42d1b3c8f52.pdf
Isfahan University of Technology, The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 6 1 2019 11 26 Cross-section for & gamma e & rarr e & nu& nu& oline and & gamma& gamma& rarr& nu& nu& oline inelastic acattering Cross-section for & gamma e & rarr e & nu& nu& oline and & gamma& gamma& rarr& nu& nu& oline inelastic acattering 15 26 511 FA M. Zeinali M. Haghighat Journal Article 2019 11 26  We study processes in which neutrinos can be generated as a possible source for the neutrion emission form neutron stars. In the high energy limit and in the range em< E< Mw the cross sention for ye→evv  is analytically calculated. We also calculate the cross section for yy→vv  in the noncommutative space. The obtained results in comparison with the cross section for yy→vv  and yy→ yvv  in the commutative space could be quite important in the astrophysics. As a result the cross section for yy→ vv  in the noncommutative spaces, in the range =100-300Gev , is comparable with its counterpart in the commutative space.  We study processes in which neutrinos can be generated as a possible source for the neutrion emission form neutron stars. In the high energy limit and in the range em< E< Mw the cross sention for ye→evv  is analytically calculated. We also calculate the cross section for yy→vv  in the noncommutative space. The obtained results in comparison with the cross section for yy→vv  and yy→ yvv  in the commutative space could be quite important in the astrophysics. As a result the cross section for yy→ vv  in the noncommutative spaces, in the range =100-300Gev , is comparable with its counterpart in the commutative space. Photon-neotrino interaction non commutative space scattering cross-section https://ijpr.iut.ac.ir/article_511_bebf2bd75c28545c2354f7a07b7bb6dd.pdf
Isfahan University of Technology, The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 6 1 2019 11 26 Dependent of electrical resistivity of thin wire on magnetic field and temperature Dependent of electrical resistivity of thin wire on magnetic field and temperature 27 32 512 FA E. Sadeghi M. Zare Journal Article 2019 11 26   Variation of electrical resistivity of Bismuth nanowire versus magnetic field the and temperature are considered. We study the size effect and surface scattering of the carrier in thin wire for systems with ellipsoidal fermi surfaces. Results are in good agreement with experimental points.   Variation of electrical resistivity of Bismuth nanowire versus magnetic field the and temperature are considered. We study the size effect and surface scattering of the carrier in thin wire for systems with ellipsoidal fermi surfaces. Results are in good agreement with experimental points. size effect ellipsoidal Fermi surface specular reflection https://ijpr.iut.ac.ir/article_512_b381057695f28232fc00e81fc3d2aae9.pdf
Isfahan University of Technology, The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 6 1 2019 11 26 Contribution of CSB interactions in binding energy difference of mirror nuclei Contribution of CSB interactions in binding energy difference of mirror nuclei 33 38 513 FA M. Asghari Journal Article 2019 11 26   Nolen-Schiffer Anomaly in mirror nuclei due to the NN interactions with isospin mixing between T=0 and T=1 mesons of the same spin and parity are investigated. With the computation of coulomb energy along with the charge symmetry breaking (CSB) effects provide a reasonably accurate description of binding energy differences between  39ca- 39k- , 41cs- 41ca mirror nuclei.    Nolen-Schiffer Anomaly in mirror nuclei due to the NN interactions with isospin mixing between T=0 and T=1 mesons of the same spin and parity are investigated. With the computation of coulomb energy along with the charge symmetry breaking (CSB) effects provide a reasonably accurate description of binding energy differences between  39ca- 39k- , 41cs- 41ca mirror nuclei.  charge symmetry interaction binding energy https://ijpr.iut.ac.ir/article_513_342dcbe4ba0886cbf140aa3bcdaf335f.pdf
Isfahan University of Technology, The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 6 1 2019 11 26 Response of Landau energy levels to the change of magnetic flux in non-isotropic impurities Response of Landau energy levels to the change of magnetic flux in non-isotropic impurities 39 441 514 FA S. Ramezani Sani A. Morteza Ali M. R. Sarkardei Journal Article 2019 11 26   We have studied a practical approach for the inclusion of non-isotropic impurities in the systems showing integer quantum Hall effect. We observe that if the impurity distribution in the direction which the electric field applys, then the localized levels goes out from the origin with respect to the isotropic case, and the Hall step will the clearly observed.   We have studied a practical approach for the inclusion of non-isotropic impurities in the systems showing integer quantum Hall effect. We observe that if the impurity distribution in the direction which the electric field applys, then the localized levels goes out from the origin with respect to the isotropic case, and the Hall step will the clearly observed. Landau levels non-isotropic distribution Hall step extended and localized levels https://ijpr.iut.ac.ir/article_514_be98ee948a3c8cb20393d2470336e62e.pdf
Isfahan University of Technology, The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 6 1 2019 11 26 The Klein-Gordon and the Dirac oscillators in a non-commutative space and in a constant magnetic field The Klein-Gordon and the Dirac oscillators in a non-commutative space and in a constant magnetic field 45 48 515 FA B. Mirza R. Narimani A. Sadeghi T. Ameri Journal Article 2019 11 26  In this paper the Klein-Gordon and the Dirac Oscillators in a non-commutative space and in a constant magnetic field are investigated. It is shown that for a specific value of the magnetic field, one may map these oscillators from a non-commutative space to a commutative space.  In this paper the Klein-Gordon and the Dirac Oscillators in a non-commutative space and in a constant magnetic field are investigated. It is shown that for a specific value of the magnetic field, one may map these oscillators from a non-commutative space to a commutative space. Dirac oscilator noncommutative space https://ijpr.iut.ac.ir/article_515_8fb61f959eb05cc132c54f872baeb2df.pdf
Isfahan University of Technology, The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 6 1 2019 11 26 The effect of temperature and atmosphere on spinel phase formation of nano-manganese ferrite The effect of temperature and atmosphere on spinel phase formation of nano-manganese ferrite 49 52 516 FA B. Nasr J. Amighian M. Mozaffar Journal Article 2019 11 26  Phase formation of manganese ferrite prepared by co-precipitation method is studied at different annealing temperatures. It is shown that the spinel phase is formed by quenching only in inert gas. XRD patterns show that the background picks fall in intensity by increasing annealing temperature and the single phase is achieved by magnetic separation.  Phase formation of manganese ferrite prepared by co-precipitation method is studied at different annealing temperatures. It is shown that the spinel phase is formed by quenching only in inert gas. XRD patterns show that the background picks fall in intensity by increasing annealing temperature and the single phase is achieved by magnetic separation. nanoparticle magnetic separation inert atmosphere https://ijpr.iut.ac.ir/article_516_f411de2a2066b04e4cf370fb1219e959.pdf
Isfahan University of Technology, The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 6 1 2019 11 26 Growth of Cd0.96Zn0.04Te single crystals by vapor phase gas transport method Growth of Cd<sub>0.96</sub>Zn<sub>0.04</sub>Te single crystals by vapor phase gas transport method 53 53 517 FA S. H. Tabatabai Yazdi M. R. Alinejad N. Tajabor Journal Article 2019 11 26   Cd0.96Zn0.04Te crystals were grown using vapor phase gas transport method (VPGT). The results show that dendritic crystals with grain size up to 3.5 mm can be grown with this technique. X-ray diffraction and Laue back-reflection patterns show that dendritic crystals are single-phase, whose single crystal grains are randomly oriented with respect to the gas-transport axis. Electrical measurements, carried out using Van der Pauw method, show that the as-grown crystals have resistivity of about 104 Ω cm and n-type conductivity.   Cd0.96Zn0.04Te crystals were grown using vapor phase gas transport method (VPGT). The results show that dendritic crystals with grain size up to 3.5 mm can be grown with this technique. X-ray diffraction and Laue back-reflection patterns show that dendritic crystals are single-phase, whose single crystal grains are randomly oriented with respect to the gas-transport axis. Electrical measurements, carried out using Van der Pauw method, show that the as-grown crystals have resistivity of about 104 Ω cm and n-type conductivity. semiconductors crystal growth Cd0.96Zn0.04Te vapor phase gas transport https://ijpr.iut.ac.ir/article_517_7f120c4708720e27b36a81d1f582498e.pdf